Si 2323 – Si 2324 – Si 2325

Many of the alternative interstage attemperator systems overlook several or all of the root causes of failure. Such designs will lead to problems in your plant, it’s only a matter of time!

Some of the first signs of trouble start with uncontrolled spraywater flow and leakage. Scheduled inspections often reveal:

• Damaged spray nozzles
• Cracked attemperator housings
• Damaged seals
• Cracked steam pipes and boiler tubes
• Cracked-broken thermal liners
• High pressure drop through the spraywater control portion of the attemperator
• High thermal stresses caused by large temperature differences between the steam and the cooling water
• Poor atomization of the cooling water leading to large amounts of unevaporated water in the steam line
• Poor installation with short distances to downstream elbows, temperature sensors, or HRSG re-entry points.

The root cause of most interstage attemperator problems can be traced to four main system-installation parameters:

• Damaged spray nozzles
• Cracked attemperator housings
• Damaged seals
• Cracked steam pipes and boiler tubes
• Cracked-broken thermal liners
• High pressure drop through the spraywater control portion of the attemperator
• High thermal stresses caused by large temperature differences between the steam and the cooling water
• Poor atomization of the cooling water leading to large amounts of unevaporated water in the steam line
• Poor installation with short distances to downstream elbows, temperature sensors, or HRSG re-entry points.